Kahraman Erkan, Keles Nursen, Parsova Kemal Emrecan, Bastopcu Murat, Karatas Mesut
Department of Cardiology, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital University of Health Sciences Istanbul Turkey.
Department of Cardiology Zile State Hospital Tokat Turkey.
J Arrhythm. 2023 Jan 8;39(1):34-41. doi: 10.1002/joa3.12806. eCollection 2023 Feb.
Premature ventricular complex (PVC) is a frequent finding in the general population. The atrial conduction time (ACT) is the period between the electrocardiographic P wave and the atrial mechanical contraction, and its prolongation indicates an atrial electromechanical delay (EMD). In our study, we compared atrial conduction parameters by echocardiographic methods between patients with frequent PVC and healthy control subjects.
The study included 54 patients with PVC and 54 healthy volunteers. Atrial conduction parameters were measured with echocardiographic examination. The time difference between the p wave and the Am wave was measured in the septal, lateral, and tricuspid annulus regions. The interatrial EMD, left atrial intra-atrial delay, and the right atrial intra-atrial delay were calculated from these measurements. The groups were compared for demographic and electrocardiographic features and echocardiographic parameters.
Left intra-atrial EMD, right intra-atrial EMD, and interatrial EMD were significantly longer in the patient group ( = .001, < .001, < .001, respectively). PA lateral, PA septal, and PA tricuspid durations were significantly prolonged in the patient group (all < .001). All ACT parameters were significantly prolonged in patients with PVC QRS duration of 150 ms and above (all < .001). All ACT parameters were prolonged in PVCs of right ventricular origin than those of left ventricular origin (all < .001). ACT parameters were prolonged in patients with a coupling interval time below 485 ms (all < .001).
Atrial conduction times are prolonged in patients with frequent PVC.
室性早搏（PVC）在普通人群中很常见。心房传导时间（ACT）是心电图P波与心房机械收缩之间的时间段，其延长表明心房电机械延迟（EMD）。在我们的研究中，我们通过超声心动图方法比较了频发PVC患者与健康对照者的心房传导参数。
该研究纳入了54例PVC患者和54名健康志愿者。通过超声心动图检查测量心房传导参数。在间隔、侧壁和三尖瓣环区域测量P波与Am波之间的时间差。根据这些测量结果计算房间隔EMD、左心房内延迟和右心房内延迟。比较两组的人口统计学和心电图特征以及超声心动图参数。
患者组的左心房内EMD、右心房内EMD和房间隔EMD明显更长（分别为P = 0.001、P < 0.001、P < 0.001）。患者组的PA侧壁、PA间隔和PA三尖瓣持续时间明显延长（均P < 0.001）。PVC QRS持续时间为150 ms及以上的患者所有ACT参数均明显延长（均P < 0.001）。右心室起源的PVC的所有ACT参数比左心室起源的PVC延长（均P < 0.001）。耦合间隔时间低于485 ms的患者ACT参数延长（均P < 0.001）。
频发PVC患者的心房传导时间延长。
